84240553 has 2 divisors, whose sum is σ = 84240554. Its totient is φ = 84240552.

The previous prime is 84240551. The next prime is 84240571. The reversal of 84240553 is 35504248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80066704 + 4173849 = 8948^2 + 2043^2 .

It is a cyclic number.

It is not a de Polignac number, because 84240553 - 2¹ = 84240551 is a prime.

Together with 84240551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (84240551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42120276 + 42120277.

It is an arithmetic number, because the mean of its divisors is an integer number (42120277).

Almost surely, 2^84240553 is an apocalyptic number.

It is an amenable number.

84240553 is a deficient number, since it is larger than the sum of its proper divisors (1).

84240553 is an equidigital number, since it uses as much as digits as its factorization.

84240553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 84240553 is about 9178.2652500350. The cubic root of 84240553 is about 438.3695736766.

The spelling of 84240553 in words is "eighty-four million, two hundred forty thousand, five hundred fifty-three".